at the case of protecting heritage, urban spirit assessment and its value should be considered. In the case of historic cities, this assessment is more complex, because these areas are dynamic and evolving over time. This paper has shown existing problem that most of them have focused mainly on the physical characteristics of urban conservation and heritage protection in the context of urban development in Isfahan city. Such as Climate and environment, Historic cities structure, Formation of urban spaces and other factors. It describes the evolution of a conservation program for the historic centre of Isfahan city and provides an overview of urban conservation diagram and practices in numeric format. Finally, conclusions are drawn about the link between conservation and urban spirit.